Mitsubishi FR-BU2-1.5K, Instruction Manual

Page: 30 / 65

23
WIRING
3.5.3 Master/slave operation when connecting several brake
units
Parallel operation by master
⇔
slave operation (10 units maximum)
When several units are conected, make sure to connect a signal cable to
terminals (MSG, SD) for master/slave to operate.
*1 When using the FR-BU2 with the FR-A500, A700 series inverter 7.5K or less or FR-V500
series inverter 5.5K or less, be sure to remove a jumper across terminal PR and PX.
*2 When connecting several FR-BU2 to one inverter, connect P/+ of each FR-BU2 and of the
inverter and N/- respectively. Do not pass wires from terminal P/+ and N/- of the FR-BU2 to
terminals of other FR-BU2.
*3 The wiring length of the terminal MSG and SD should be 10m maximum. In addition, twist
five times or more per 1m.
CAUTION
To emphasize connection of master/slave operation in this diagram, other
connections are not shown. When actually connecting units, configure a
circuit which prevents resistor overheat as shown in a connection example
"When connecting several brake units to one inverter" on
page 22
.
FR-BR
P
PR
P
PR
MC
R/L1
Motor
IM
Inverter
Brake unit FR-BU2
Brake unit
FR-BU2
Brake unit FR-BU2
S/L2
T/L3
U
V
P/+
N/-
W
Three
phase
AC
power
supply
MCCB
P/+
N/-
P/+
N/-
P/+
N/-
BUE
SD
MSG
SD
MSG
SD
PR
BUE
SD
MSG
SD
MSG
SD
PR
BUE
SD
MSG
SD
MSG
SD
PR
PR
PX
*1
Registor unit
FR-BR
Registor unit
FR-BR
Registor unit
FR-BR
P
PR
*2
*3
*3